ACL engine bearing shells and retail packaging — representative product photo
ACL engine bearing-shell profile drawing — shell shape and oil-hole layout
ACL engine bearing-shell profile drawing — shell shape and oil-hole layout
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ACL Nissan VQ35DE 3.5L-V6 Standard Size High Performance w/ Extra Oil Clearance Main Bearing Set

ACL
ACL4M2633HX-STD
9315726166482
Bearings
7 Units In Stock
$ 147.04
$ 147.04

ACL 4M2633HX-STD is a main bearing set for the cataloged Nissan VQ20DE, VQ25DE, VQ25DET, VQ30DE engine configurations. STD manufacturer size designation; verify the exact engine and assembled clearance.

Bearing Configuration

HX specifies 0.001 inch (0.025 mm) additional oil clearance relative to the corresponding H-STD set on the specified standard-size shaft. It is separate from any repair-size or housing-oversize designation.

ACL’s 2023 guide lists 4M2633 main bearings for VQ20DE, VQ25DE, VQ30DE, VQ30DET and VQ35DE. The associated rod families differ: 6B2630 for the listed 2.0L/2.5L/3.0L applications with a 48 mm rod tunnel, and 6B2640 for VQ35DE. VQ35HR, VQ37VHR and VR30DDTT instead use 1M2505 graded or 4M2505 main bearings; a shared VQ name does not establish interchangeability.

Engine Application

Manufacturer / Engine Nissan — VQ20DE
Manufacturer / Engine Nissan — VQ25DE
Manufacturer / Engine Nissan — VQ25DET
Manufacturer / Engine Nissan — VQ30DE
Manufacturer / Engine Nissan — VQ30DET
Manufacturer / Engine Nissan — VQ35DE

The engine-family list identifies catalog applications, not universal vehicle fitment. Confirm the exact engine version, crankshaft, rods, block and bearing location. Vehicle names and photos do not replace dimensional verification.

Specifications

Brand ACL
Manufacturer Part Number 4M2633HX-STD
Component Main Bearing Set
Size Selection STD manufacturer size designation; verify the exact engine and assembled clearance.
Catalog Main Housing Bore (STD journal) 63.993–64.017 mm
Catalog Main Journal Diameter (STD) 59.951–59.975 mm
Catalog Family ACL Race Series
Half Type Upper & lower
Catalog Size Options STD

Quantity and Assembly Checks

Confirm the set contents, bearing positions and any separate thrust components against the complete manufacturer number. The photo is representative of the part family.

Measure shaft journals, housing bores and assembled oil clearance using the engine builder’s specification. Check oil-hole alignment, groove placement and crankshaft fillet clearance before final assembly. Catalog standard dimensions must not be treated as the finished dimensions for a different repair size. ACL specifies that abrasive pads or paper must not be used on the bearing surface to alter oil clearance.

Frequently Asked Questions

Is the year and model enough to choose this bearing? No. Match 4M2633HX-STD to the exact engine and measured build specification.

What size is this listing? STD manufacturer size designation; verify the exact engine and assembled clearance.

Can I substitute a different suffix? Compare the complete grade, size, locating features and assembled clearance before substituting any bearing.

Related Engine Parts

For the VQ35DE application, see ACL 6B2640HX-STD rod bearings. This is a separately sold component with its own measured journal clearance; confirm the exact engine code and size before pairing parts.

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